Creating cables that can drape over objects
You can do this wihout cloth simulation, use the Draw Curves tool.
Add a Bézier curve object.
In edit mode delete all vertices (x).
Select Draw Curve from the toolbox

Press N to bring out the properties region, and in the Tool tab set the Draw Depth to Surface.
Then draw your curve freely.

Then set the curve to have some bevel, to make it the width you need.

You might need to adjust the Tolerance and Detect Corner values to fit your particluar needs.
For more detail on the tool read the manual:
https://docs.blender.org/manual/en/latest/modeling/curves/tools/draw.html?highlight=draw%20curve